[Emacs] Set up travis html generation

bin/Cask

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+(source org)
+(source melpa)
+
+(depends-on "use-package")
+(depends-on "org-plus-contrib")
+(depends-on "htmlize")

bin/compile.sh

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+#!/usr/bin/env bash
+
+export PATH="$HOME/.cask/bin:$HOME/.evm/bin:$PATH"
+THIS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+TARGET=$(readlink -f "$THIS_DIR/../dotfiles/emacs.d/README.org")
+
+git clone https://github.com/rejeep/evm.git "$HOME/.evm"
+evm config path /tmp
+evm install emacs-25.1-travis --use --skip
+
+export EMACS=$(sh -c 'type -P emacs')
+
+curl -fsSkL https://raw.github.com/cask/cask/master/go | python
+
+cask install
+cask exec emacs --script generate-html.el
+
+cp "../dotfiles/emacs.d/README.html" out

bin/deploy.sh

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+#!/usr/bin/env bash
+# This approach was adapted from https://gist.github.com/domenic/ec8b0fc8ab45f39403dd
+
+set -e # Exit with nonzero exit code if anything fails
+
+SOURCE_BRANCH="master"
+TARGET_BRANCH="gh-pages"
+
+function doCompile {
+  ./compile.sh
+}
+
+# Pull requests and commits to other branches shouldn't try to deploy, just build to verify
+if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_BRANCH" != "$SOURCE_BRANCH" ]; then
+    echo "Skipping deploy; just doing a build."
+    doCompile
+    exit 0
+fi
+
+# Save some useful information
+REPO=`git config remote.origin.url`
+SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
+SHA=`git rev-parse --verify HEAD`
+
+# Clone the existing gh-pages for this repo into out/
+# Create a new empty branch if gh-pages doesn't exist yet (should only happen on first deply)
+git clone $REPO out
+cd out
+git checkout $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
+cd ..
+
+# Clean out existing contents
+rm -rf out/**/* || exit 0
+
+# Run our compile script
+doCompile
+
+# Now let's go have some fun with the cloned repo
+cd out
+git config user.name "$COMMIT_AUTHOR_NAME"
+git config user.email "$COMMIT_AUTHOR_EMAIL"
+
+# If there are no changes to the compiled out (e.g. this is a README update) then just bail.
+if [ -z `git diff --exit-code` ]; then
+    echo "No changes to the output on this push; exiting."
+    exit 0
+fi
+
+# Commit the "changes", i.e. the new version.
+# The delta will show diffs between new and old versions.
+git add .
+git commit -m "Deploy to GitHub Pages: ${SHA}"
+
+# Get the deploy key by using Travis's stored variables to decrypt deploy_key.enc
+ENCRYPTED_KEY_VAR="encrypted_${ENCRYPTION_LABEL}_key"
+ENCRYPTED_IV_VAR="encrypted_${ENCRYPTION_LABEL}_iv"
+ENCRYPTED_KEY=${!ENCRYPTED_KEY_VAR}
+ENCRYPTED_IV=${!ENCRYPTED_IV_VAR}
+openssl aes-256-cbc -K $ENCRYPTED_KEY -iv $ENCRYPTED_IV -in deploy_key.enc -out deploy_key -d
+chmod 600 deploy_key
+eval `ssh-agent -s`
+ssh-add deploy_key
+
+git push $SSH_REPO $TARGET_BRANCH

bin/generate-html.el

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+(package-initialize)
+
+(require 'ox-html)
+(require 'htmlize)
+
+(defmacro do-nothing (name)
+  `(defun ,name (&rest args) nil))
+
+(do-nothing imalison:add-to-org-agenda-files)
+(do-nothing imalison:disable-linum-mode)
+
+(setq emacs-dir
+      (expand-file-name "../dotfiles/emacs.d/"
+                        (file-name-directory load-file-name)))
+
+(setq readme-src (concat emacs-dir "README.org"))
+
+(org-babel-tangle-file readme-src)
+(load-file (concat emacs-dir "org-config.el"))
+
+(defun export-target (target)
+  (with-current-buffer (find-file-noselect target)
+    (let ((org-export-headline-levels 10))
+      (org-html-export-to-html))))
+
+(setq org-html-postamble nil)
+(setq org-html-htmlize-output-type 'css)
+(setq org-confirm-babel-evaluate nil)
+
+(message (export-target readme-src))